byobu 5.25 not working in Python 2.6

I have just installed 5.24 and it still works with Python 2.6.

Confirming.

The problem appears when using tmux and there is a tmux session already running.

Still happens in 5.26.

@Daniel: I have the same problem, and I'm using the screen backend.

I confirm the problem occurs on a Lucid server (python 2.6.5) with Byobu 5.26, both with the tmux and screen backends.

Steps to reproduce:
* Run byobu-screen
* Dettach from session (press F6)
* Try running byobu-screen again

Expected result:
* Attach to Byobu / screen session

Actual result:
* Error message ending in "AttributeError: 'module' object has no attribute 'check_output'"

Temporary workaround:
* Run "byobu-screen -r" to manually indicate re-attach, and bypass subprocess checking

Traceback (most recent call last):
  File "/usr/bin/byobu-select-session", line 97, in <module>
    sessions = get_sessions()
  File "/usr/bin/byobu-select-session", line 63, in get_sessions
    output = subprocess.check_output(["tmux", "list-sessions"])
AttributeError: 'module' object has no attribute 'check_output'
Traceback (most recent call last):
  File "/usr/bin/byobu-select-session", line 97, in <module>
    sessions = get_sessions()
  File "/usr/bin/byobu-select-session", line 63, in get_sessions
    output = subprocess.check_output(["tmux", "list-sessions"])
AttributeError: 'module' object has no attribute 'check_output'

Confirmed. Fixing now :-(

Committed revision 2016.

Thanks Dustin!

Was the fix included in 5.27? Because i still get the same error:

:~$ byobu -v
byobu version 5.27
tmux 1.5
:~$ byobu
Traceback (most recent call last):
  File "/usr/bin/byobu-select-session", line 97, in <module>
    sessions = get_sessions()
  File "/usr/bin/byobu-select-session", line 63, in get_sessions
    output = subprocess.check_output(["tmux", "list-sessions"])
AttributeError: 'module' object has no attribute 'check_output'

Still error for me too:

marcio.merlone@phobos:~$ byobu
Traceback (most recent call last):
  File "/usr/bin/byobu-select-session", line 97, in <module>
    sessions = get_sessions()
  File "/usr/bin/byobu-select-session", line 63, in get_sessions
    output = subprocess.check_output(["tmux", "list-sessions"])
AttributeError: 'module' object has no attribute 'check_output'
marcio.merlone@phobos:~$ byobu -v
byobu version 5.27
tmux 1.5
marcio.merlone@phobos:~$ grep CODENAME /etc/lsb-release
DISTRIB_CODENAME=lucid
marcio.merlone@phobos:~$ uname -a
Linux phobos 2.6.32-45-server #101-Ubuntu SMP Mon Dec 3 15:54:27 UTC 2012 x86_64 GNU/Linux
marcio.merlone@phobos:~$

Forgot to mention: killed previous tmux sessions and started a new one after upgrade. Detached by ctrl+a+a, and reattached to get the error.

As a workaround I managed to install python2.7 from this ppa (1) but apps are still using python2.6. Could not issue update-alternatives --config python, it says there is no alternative for python. If I try to uninstall python2.6 it breaks a lot of dependencies, not good.

Now what? Any ideas?

(1) https://launchpad.net/~pythoneers/+archive/lts

I just installed byobu 5.24 on all servers: https://launchpad.net/~byobu/+archive/ppa/+files/byobu_5.24-0ubuntu1~lucid_all.deb

What is the next step for this bug, though? I’ll just reopen.

Ah, okay, I think I have it fixed now. Sorry about that! Please reopen if you can still reproduce in 5.29.

Committed revision 2035.

Thanks Dustin, I can confirm that 5.29 works!

Yes, fixed, it works on Lucid 10.04. Thank you.

Could you please also change

#!/usr/bin/python

to

#!/bin/env python

especially when using a local install of python, this hard-coded location leads to unexpected errors

@Nicolas: I have this requested some time ago already, too (Bug #996559).

I am re-opening it and adding a comment to use "env" in the source, but a fixed python path when installing it for distributions.
Please point any further comments in this regard at the bug mentioned above.